diff --git a/armsrc/mifareutil.c b/armsrc/mifareutil.c
index 1de6d95f8..306f7a14e 100644
--- a/armsrc/mifareutil.c
+++ b/armsrc/mifareutil.c
@@ -358,7 +358,7 @@ int mifare_ultra_readblockEx(uint8_t blockNo, uint8_t *blockData) {
         return 3;
     }
 
-    memcpy(blockData, receivedAnswer, 14);
+    memcpy(blockData, receivedAnswer, 16);
     return 0;
 }
 int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData) {